Note the many statements of "fact" that come straight from Synlubes site:
"OK the final scoop on SAE 5W-20 and SAE 0W-20 oils:
You will definitely get better mileage with SAE 5W-20 then SAE 5W-30 oil, but not by much, usually the optimistic estimates are LESS than 1%. The bad news is about 30% reduction in engine life (from 100,000 miles or 10 years to 70,000 miles or 7 years)."
OK, lets stop and think about that. My last three vehicles have gone 300K miles on 0W20..... and they act like they could go 300K more. No, I am not claiming that they will, but they sure seem like it. Yet Synlube makes a statement of fact that my motor will only last 70K on 5W20.
Do you suppose they have any facts to back up ANYTHING that is on their site.....
Glad to hear that such wise people can make an oil that never needs to be changed!!! PT Barnum has many students it seems!